-smx_synchro_t execution_start(const char* name, double flops_amount, double priority, double bound, unsigned long affinity_mask);
-smx_synchro_t execution_parallel_start(const char* name, int host_nb, sg_host_t* host_list, double* flops_amount, double* bytes_amount, double amount, double rate) [[nohandler]];
-void execution_cancel(smx_synchro_t execution) [[nohandler]];
-void execution_set_priority(smx_synchro_t execution, double priority) [[nohandler]];
-void execution_set_bound(smx_synchro_t execution, double bound) [[nohandler]];
-void execution_set_affinity(smx_synchro_t execution, sg_host_t ws, unsigned long mask) [[nohandler]];
-int execution_wait(smx_synchro_t execution) [[block]];
+smx_activity_t execution_start(const char* name, double flops_amount, double priority, double bound, unsigned long affinity_mask);
+smx_activity_t execution_parallel_start(const char* name, int host_nb, sg_host_t* host_list, double* flops_amount, double* bytes_amount, double amount, double rate) [[nohandler]];
+void execution_cancel(smx_activity_t execution) [[nohandler]];
+void execution_set_priority(smx_activity_t execution, double priority) [[nohandler]];
+void execution_set_bound(smx_activity_t execution, double bound) [[nohandler]];
+void execution_set_affinity(smx_activity_t execution, sg_host_t ws, unsigned long mask) [[nohandler]];
+int execution_wait(smx_activity_t execution) [[block]];